Sidney Crosby scored again as Canada beat host Czech Republic 6-3 at the ice hockey world championship on Monday, and the United States bested defending champion Russia 4-2. It was the third win in three games for both North American teams and Sweden equaled their record by routing Latvia 8-1. Last year’s runner-up Finland blanked Norway 5-0 for its second win. Philadelphia Flyers center Sean Couturier broke a 2-2 tie for Canada 2:20 before the end of the second period.